| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1987: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1986: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Research Abstract |
Hydrogen-induced amorphization(HIA) has become one of the most attractive methods for producing amorphous alloys without rapid quenching. However, amorphizing alloy systems, the structure, the progress, and the mechanism of HIA are still uncertain. The purposes of the present investigation are to examine the nature of HIA, to obtain a detailed understanding of the progress, and to examine the magnetic properties of the resultant amorphous alloys. By hydrogenation of the Laves phase RM_2 compounds( R = a rare earth metal, M = Fe, Co, Ni), the amorphous RM_2H_2 alloys were synthesized where the decomposition of the compounds into the RH_2 and M(or an intermetallic compound) is suppressed because of low diffusion rates of the metallic atoms. The whole crystalline phase does not transform to the amorphous state at a time, but the amorphous phase nucleates and grows with increasing hydrogen conten. The magnetic properties of the hydrogen induced amorphous alloys are identical to those of the hydrogenated amorphous alloys, suggesting similarity of their structures.
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